JVC 250 Service Manual page 187

Glossary
Field
Frame
Horizontal Scan
Reversal Jumper
Horizontal Size Coils
Hot Spot
Hue
Ignitor
Image Light Amplifier
®
ILA
Image Mirror
Interlacing
I/R Detector
Laser Power Supply
A-2
One half of a complete video frame. Odd lines in
one field and even lines in another make up one
frame.
One complete TV picture or screen of
information. It is composed of two fields and has
a total of 525 scanning lines in NTSC
transmission.
Reverses the image projection for front or rear
projection. Located on the Horizontal Deflection
Board and Scan Reversal PCB.
Adjustment coils on the Scan Reversal Board.
Used to adjust the horizontal size (width).
The Arc Lamp's brightest area on the screen.
Used to align and focus the Arc Lamp.
Also referred to as tint. A specific color such a
blue, pink or aqua. Hue or tint control on a
display device adjusts red/green balance.
Provides a momentary high voltage to excite the
gases in the Xenon Arc Lamp to ignite.
A device that uses low-intensity images to phase
modulate a high-intensity light through a liquid
crystal layer. It is a key component in
producing very bright, high resolution images
from Hughes-JVC large-screen projectors.
Also referred to as a "Steering Mirror". It directs
the blue and red images toward the Combining
Prism.
The technique that refreshes a display screen by
alternately displaying all the odd lines (field one)
and then all the even lines (field two) of one
frame.
The Model 250 Projector has two I/R Detectors,
one in front, one in back. These windows receive
projector control signals from the I/R Remote
Control.
Provides boost voltage through a spark gap to the
Ignitor.
Model 250 Service Manual